By default the YAMON bootloader only enables the UART's it is using, two at max. For the AU1100 only UART0 and UAR3 are enabled, leaving UART1 non-functional. You can simply edit the reset source file named arch/init/reset_<name of your platform>.c to enable it. Check for the uart_enable register (Offset=0x0100 from the base address) in the databook.

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By default the [[YAMON]] bootloader only enables the UART's it is using, two at max. For the AU1100 only UART0 and UAR3 are enabled, leaving UART1 non-functional. You can simply edit the reset source file named arch/init/reset_<name of your platform>.c to enable it. Check for the uart_enable register (Offset=0x0100 from the base address) in the databook.

UART

By default the YAMON bootloader only enables the UART's it is using, two at max. For the AU1100 only UART0 and UAR3 are enabled, leaving UART1 non-functional. You can simply edit the reset source file named arch/init/reset_<name of your platform>.c to enable it. Check for the uart_enable register (Offset=0x0100 from the base address) in the databook.